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Finding the Fourth Proportional to 86,667.50, 130,001.25 and 21,003.50

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Solution

The fourth proportional to 86,667.50, 130,001.25 and 21,003.50 is: 31,505.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,667.50 : 130,001.25 = 21,003.50 : x
  2. Step 2: Convert to fraction form
    86,667.50/130,001.25 = 21,003.50/x
  3. Step 3: Cross multiply
    86,667.50x = 130,001.25 × 21,003.50
  4. Step 4: Simplify right side
    86,667.50x = 2,730,481,254.38
  5. Step 5: Solve for x
    x = 2,730,481,254.38/86,667.50
  6. Step 6: Final answer
    x = 31,505.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.